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装配式建筑剪力墙结构抗震性能分析

江西建材 2024年第7期 308-310页

作者：王徐林仁怀市城市开发建设投资经营有限公司

为深入分析装配式建筑剪力墙结构的抗震性能，文中对比分析3种剪力墙结构试件的荷载-位移曲线、刚度退化曲线、延度性能以及耗散性能。结果表明，随着加载位移的增加，装配式剪力墙承受的荷载水平表现为先近似线性增加,然后快速降低再... 详细信息

为深入分析装配式建筑剪力墙结构的抗震性能，文中对比分析3种剪力墙结构试件的荷载-位移曲线、刚度退化曲线、延度性能以及耗散性能。结果表明，随着加载位移的增加，装配式剪力墙承受的荷载水平表现为先近似线性增加,然后快速降低再缓慢降低的变化规律；装配式剪力墙的刚度退化曲线呈现出近似正态分布的的变化规律；柱截面结构尺寸越小，装配式剪力墙的延性性能越好，轴压比越大，装配式剪力墙的延性性能越好；柱截面尺寸越大，装配式墙体结构试件的屈服性能越强，轴压比越小，装配式墙体结构试件的屈服性能越强。

关键词：装配式建筑剪力墙抗震性能延性性能耗散性能

周期1与准周期访问映射下的层流混沌及其耦合同步

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河南师范大学学报（自然科学版） 2024年第5期52卷 51-58,I0004页

作者：朱云王旭林邱国强江西理工大学理学院江西赣州341000

使用周期1与准周期两种周期的访问映射,在一个新系统中观察层流混沌.对2种不同周期的访问映射产生的层流混沌系统,采用延迟调制进行耦合,观察它们的同步行为.发现周期1访问映射下,改变影响访问映射的参数,能观察到相应的广义超前预期同... 详细信息

使用周期1与准周期两种周期的访问映射,在一个新系统中观察层流混沌.对2种不同周期的访问映射产生的层流混沌系统,采用延迟调制进行耦合,观察它们的同步行为.发现周期1访问映射下,改变影响访问映射的参数,能观察到相应的广义超前预期同步,广义滞后同步和完全同步分别出现.而对于准周期访问映射,在某些时候,广义滞后同步和超前预期同步同时存在.

关键词：层流混沌访问映射广义超前预期同步广义滞后同步完全同步

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考虑时间因素的铁路隧道防灾通风方案研究

铁道工程学报 2023年第10期40卷 99-104页

作者：王煦霖极端环境岩土和隧道工程智能建养全国重点实验室西安710043

研究目的:隧道防灾通风系统启动后,疏散横通道防护门不能立刻达到临界风速,尚需等待一定的时间。现行铁路防灾规范要求安全疏散时间不宜超过6 min,可见疏散前期的时间是十分宝贵的,防灾通风系统的及时性是必须考虑的问题。基于此,本文... 详细信息

研究目的:隧道防灾通风系统启动后,疏散横通道防护门不能立刻达到临界风速,尚需等待一定的时间。现行铁路防灾规范要求安全疏散时间不宜超过6 min,可见疏散前期的时间是十分宝贵的,防灾通风系统的及时性是必须考虑的问题。基于此,本文研究两单隧道互为救援时的防灾通风系统,建立防灾通风网络模型,从整体上对救援站供风策略开展对比分析,另外也对目前广泛采用的安全隧道供风的漏风率进行研究。研究结论:(1)安全隧道供应新鲜风时,普通横通道防护门门缝存在漏风,漏风率随隧道长度增加而增大,隧道长度超过36 km且门缝大于4 mm时,将有超过10%的新鲜风在送往救援站的途中损失;(2)应关注救援站防护门处风速的时变特性,以快速达到并保持不小于临界风速表征通风方案具有良好的及时性;(3)由安全隧道供风的方案,防护门处风速时变模式记为M1,该风速随时间单调增大并可划分3阶段,即初期缓慢增大、中期快速增长、后期持续缓慢增大并趋稳定;由辅助坑道供风的方案,防护门处风速时变模式记为M2,该风速峰值出现在疏散前期,可划分3阶段,即初期缓慢增大、中期快速增大并出现最大值、后期持续缓慢降低;相较而言,M2具有更优的及时性;(4)隧道内火灾可用疏散时间短,救援站防护门处风速及时达到临界风速,对于保障人员安全具有重要意义,该研究成果可为工程方案选择提供参考和借鉴。

关键词：铁路隧道防灾通风漏风防护门风速及时性

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巢湖浮游藻类功能群的组成特性及其影响因素

湖泊科学 2018年第2期30卷 431-440页

作者：王徐林张民殷进扬州大学环境学院扬州225000 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室南京210008

2015年1-12月逐月采集了巢湖9个断面的浮游植物,并对所采植物进行功能群划分,结果显示,巢湖的浮游植物可以划分为15个功能群:C、N、P、MP、S2、X1、X3、Y、F、J、H1、H2、LM、M、W1.不同时期调查的植物优势功能群存在差异,其中H2在12次... 详细信息

2015年1-12月逐月采集了巢湖9个断面的浮游植物,并对所采植物进行功能群划分,结果显示,巢湖的浮游植物可以划分为15个功能群:C、N、P、MP、S2、X1、X3、Y、F、J、H1、H2、LM、M、W1.不同时期调查的植物优势功能群存在差异,其中H2在12次调查中的优势度均≥0.02,成为巢湖的绝对优势功能群,H2功能群的组成藻类为鱼腥藻,次要的功能群为M,主要组成藻类为微囊藻,两个功能群均为富营养化功能类群.巢湖植物优势功能群不同时期的演替规律为:1月H2+Y经2月H2+J,3月H2,4月H2+F,5月H2,6月M,7月M+H2,8、9月M,11月H2+M转变为12月***分析结果显示,巢湖植物功能群分布受水环境因子影响较为明显,整体上,水温、溶解性总磷、溶解性总氮、高锰酸盐指数和水深是影响巢湖植物功能群分布格局的主要因素.

关键词：巢湖藻类功能群优势度环境因子

Advanced strategies for 3D-printed neural scaffolds:materials,structure,and nerve remodeling

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Bio-Design and Manufacturing 2024年第5期7卷 747-770页

作者： Jian He Liang Qiao Jiuhong Li Junlin Lu Zhouping Fu Jiafang Chen Xiangchun Zhang xulin Hu College of Basic Medicine and Forensic Medicine Henan University of Science and TechnologyLuoyang 471023China The First Affiliated Hospital College of Clinical Medicine of Henan University of Science and TechnologyLuoyang 471003China Tea Research Institute Chinese Academy of Agricultural SciencesHangzhou 310008China Clinical Medical College Affiliated Hospital of Chengdu UniversityChengdu UniversityChengdu 610081China Department of Cardiovascular Surgery Department of BiotherapyCancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu 610041China Department of Neurosurgery West China HospitalSichuan UniversityChengdu 610041China

Nerve regeneration holds significant potential in the treatment of various skeletal and neurological disorders to restore lost sensory and motor *** potential of nerve regeneration in ameliorating neurological diseases and injuries is critical to human ***-dimensional(3D)printing offers versatility and precision in the fabrication of neural *** neural structures such as neural tubes and scaffolds can be fabricated via *** reviewcomprehensively analyzes the current state of 3D-printed neural scaffolds and explores strategies to enhance their *** highlights therapeutic strategies and structural design involving neural materials and stem ***,nerve regeneration materials and their fabrication techniques are *** applications of conductive materials in neural scaffolds are reviewed,and their potential to facilitate neural signal transmission and regeneration is ***,the progress in 3D-printed neural scaffolds applied to the peripheral and central nerves is comprehensively evaluated,and their potential to restore neural function and promote the recovery of different nervous systems is *** addition,various applications of 3D-printed neural scaffolds in peripheral and neurological diseases,as well as the design strategies of multifunctional biomimetic scaffolds,are discussed.

关键词： Nerve regeneration 3D printing based neural scaffolds Biomaterials Nervous system Design strategies

Pollution Characteristics and Ecological Impact of Screening Analysis of Fishing Port Sediments from Dalian,North China

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Environment & Health 2024年第10期2卷 702-711页

作者： Haichao Mu xulin Hou Zilan Wu Jiaojiao Li Wenwen wang Meiling Lu Xing Liu Ziwei Yao Key Laboratory for Ecological Environment in Coastal Areas Ministry of Ecology and EnvironmentNational Marine Environmental Monitoring CenterDalian 116023China School of Light Industry and Chemical Engineering Dalian Polytechnic UniversityDalian 116034China College of Marine Science and Environment Engineering Dalian Ocean UniversityDalian 116023China Agilent Technologies(China)Ltd. Inc.Beijing 100102China Laboratory for Ecological Environment in Coastal Areas Ministry of Ecology and EnvironmentNational Marine Environmental Monitoring CenterDalian 116023China

Environmental pollution from synthetic chemical mixtures has significant adverse impacts on marine ***,identifying the main constituents of chemical mixtures that pose ecological threats is challenging due to the necessity of an integrated workflow for comprehensive identification and toxicological prioritization of ***,an all-in-one mass spectrometric strategy integrating target,suspect,and nontarget analysis was used to investigate organic pollutants of concern in fishing port sediments,with 355 pollutants(32 from target analysis,118 from suspect screening and 205 from nontarget analysis)identified in 11 *** chemical classes of polycyclic aromatic hydrocarbons(PAHs),pesticides,and intermediates were the extensively detected chemical *** ecological risks of absolutely quantified pollutants(i.e.,16 parent PAHs,7 organophosphate esters(OPEs),10 pesticides and 4 benzotriazole ultraviolet absorbers)were assessed using toxicity-weighted concentration ranking,with o,p’-DDT being the major *** the toxicological priority index(ToxPi)framework,an extended ranking of all identified pollutants was achieved by combining instrument response and detection frequency,with a priority control list of 15 pollutants obtained,of which benzo[ghi]perylene(BghiP)and p,p’-DDE had the highest risk *** to frequent detection rates and significant environmental risks,routine monitoring of petroleum pollutants is considered *** study presents a general workflow that includes comprehensive identification and prioritization of pollutants,facilitating chemical management and ecological risk assessment.

关键词： fishing port sediments suspect screening nontarget analysis toxicity-weighted concentration ToxPi ecological risk assessment

VPD modifies CO_(2) fertilization effect on tomato plants via abscisic acid and jasmonic acid signaling pathways

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Horticultural Plant Journal 2024年第5期10卷 1165-1176页

作者： Dalong Zhang Huihua Yang Xiaolu Chen Yan Li Yunzhou Li Hongye Liu xulin Wu Min Wei College of Horticultural Science and Engineering Shandong Agricultural UniversityTai'anShandong 271018China College of Agriculture Guizhou UniversityGuiyangGuizhou 550025China

Atmospheric CO_(2)concentration is elevated globally,which has“CO_(2)fertilization effects”and potentially improves plant photosynthesis,yield,and *** the beneficial effect of CO_(2)fertilization being modulated by vapor pressure deficit(VPD),the underlying mechanism is highly *** the present study,the potential roles of hormones in determining CO_(2)fertilization effects under contrasting high and low VPD conditions were investigated by integrated physiological and transcriptomic *** CO_(2)fertilization effects were offset under high VPD conditions and were constrained by plant water stress and photosynthetic CO_(2)*** VPD induced a large passive water driving force,which disrupted the water balance and consequently caused plant water *** water potential,turgor pressure,and hydraulic conductance declined under high VPD *** physiological evidence combined with transcriptomic analyses demonstrated that abscisic acid(ABA)and jasmonic acid(JA)potentially acted as drought-signaling molecules in response to high VPD *** foliar ABA and JA content triggered stomatal closure to prevent excessive water loss under high VPD stress,which simultaneously increased the diffusion resistance for CO_(2)uptake from atmosphere to leaf intercellular *** VPD also significantly increased mesophyll resistance for CO_(2)transport from stomatal cavity to fixation site inside *** chloroplast“sink”CO_(2)availability was constrained by stomatal and mesophyll resistance under high VPD stress,despite the atmospheric“source”CO_(2)concentration being ***,ABA-and JA-mediated drought-resistant mechanisms potentially modified the beneficial effect of CO_(2)fertilization on photosynthesis,plant growth,and yield *** study provides valuable information for improving the utilization efficiency of CO_(2)fertilization and a better understanding of the physiological processes.

关键词： Abscisic acid CO_(2) fertilization Jasmonic acid Mesophyll conductance Stomatal conductance Vapor pressure deficit

75°倾角正断层黏滑错动对公路隧道影响的模型试验研究

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岩石力学与工程学报 2013年第8期32卷 1714-1720页

作者：刘学增王煦霖林亮伦同济大学土木信息技术教育部工程研究中心上海200092 同济大学地下建筑与工程系上海200092 重庆市建筑科学研究院重庆400015

通过1∶50室内模型试验,开展75°倾角正断层黏滑错动影响下隧道的受力变形机制研究,并监测隧道顶部和底部的地层压力、隧道轴向和环向应变。结果表明,地层的永久变形和地层–结构的相互作用,导致围岩压力在剪切带附近发生显著变化,上盘... 详细信息

通过1∶50室内模型试验,开展75°倾角正断层黏滑错动影响下隧道的受力变形机制研究,并监测隧道顶部和底部的地层压力、隧道轴向和环向应变。结果表明,地层的永久变形和地层–结构的相互作用,导致围岩压力在剪切带附近发生显著变化,上盘范围内拱顶压力显著增大,下盘拱顶压力次之,上盘隧道底部压力减小,下盘底部压力显著增大,隧道与下部围岩可能局部脱空以适应断层的剪切位移;上盘范围内为正,下盘范围内纵向弯矩为负;以原型混凝土压坏来判定衬砌破坏,初步确定原型结构破坏所容许的最大断层位移D=1.25 m,理论上该值略偏大。

关键词：隧道工程正断层黏滑错动模型试验

45°倾角正断层粘滑错动对隧道影响试验分析

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同济大学学报（自然科学版） 2014年第1期42卷 44-50页

作者：刘学增王煦霖林亮伦同济大学土木信息技术教育部工程研究中心上海200092 同济大学土木工程学院上海200092 重庆市建筑科学研究院重庆400015

通过1∶50室内模型试验,模拟了45°倾角正断层粘滑错动下,与之正交的隧道结构的受力变形破坏过程,并布置传感器监测了隧道顶部和底部的围岩压力、隧道轴向的应变和隧道环向的应变.结果表明,围岩压力在剪切带附近发生显著变化,上盘和剪... 详细信息

通过1∶50室内模型试验,模拟了45°倾角正断层粘滑错动下,与之正交的隧道结构的受力变形破坏过程,并布置传感器监测了隧道顶部和底部的围岩压力、隧道轴向的应变和隧道环向的应变.结果表明,围岩压力在剪切带附近发生显著变化,上盘和剪切带范围内拱顶压力显著增大,下盘拱顶压力次之,上盘和剪切带隧道底部压力减小,下盘底部压力显著增大,隧道与下部围岩可能局部脱空以适应断层的剪切位移;上盘和剪切带范围内隧道纵向弯矩为正,下盘范围内为负,隧道偏心受压;以原型混凝土压坏来判定衬砌破坏,初步确定原型结构破坏所容许的最大断层位移D=0.7m,理论上该值略偏大;隧道衬砌破坏区域长度,在剪切带和下盘范围分别为1.7和2.8倍隧道宽度.

关键词：隧道正断层粘滑错动模型试验